Elevator.



J. s. MUGKLE.

ELEVATOR. I APPLIOATlON FILED APB. 21,1909.

938,268. Patented 0011.26, 1909.

2 SHEETS-SHEET 1.

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J. S. MUGKLE.

ELEVATOR. APPLICATION FILED APR. 21, 1909.

Patented Oct. 26, 1909.

SHEETS-SHEET 2.

I WE 5* WSMWH UNITED STATES PAT 1 OFFICE.

f ELEVATOR.

Specification ofJIet'ters Pa ent. L

Patented Oct. 26, 1909.

Aiiplication filed April 21, 1909. Serial No. 491,269.

To all whom it may concern:

Be it known that I,-,JHN S. MUOKLI J, a

citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Elevators,of which the following is a specification.

My invention relates to certain improvements in mechanism for preventing the opening of the landing doors of an elevator when the car is not at the landing, and. preventing the starting of the car when at a landing when the door is open.

The object of my invention is to provide means for bringing the floor of the car to a level with the floor of the landing case of leakage, which would ordinarily allow the car to either graduallysink,below the level of the landing floor or rise above it. This object I attain in the following manner, reference being had to the accompanying drawings, in which:

Figure l, is a sectional view of suflicicnt of the car and the landing to illustrate my invention; Fig.2, is a sectional plan View on the line 22 Fig; 1; Fig. 3, is a viewshowing the mechanism on the wall of the elevator well; Fig. 4, is a sectional View on the line 41 -4, l ig. 2; Fig. 5, is a View of a modification of the device illustrated in Fig. 3; and Fig. t, is a view of a modification of the mechanism for releasing the door.

A is the wall of the elevator well, B is a landing floor, C is the landing door having an arm '0 which extends into the path of the mechanism secured to the wall of the elevas tor well, and c is a latch extension of this arm with which the latch (Z engages. This latch (Z is pivoted at a? to the frame I) secured to the wall of the elevator well, and has a spring (Z tending to force it out against the yoke d.

The end of the extension 0 of the arm 0 is beveled and hooked, so that it will engage the latch (Z and thus lock the door in its closed posit-ion. When the latch d is pushed back by the mechanism on the car, it releases the door and allows it to be opened.

A rack E is adapted to slide on rods ee, mounted on the frame D. The teeth of the rack E are beveled at one or both ends, as clearly illustrated in the drawing, Fig. 3. The rack is normally held in theposition shown in Fig. 3 by a Weighted lever F pivoted at 7", having an arm, f connected by a link a to the rack E, and having a weight f of sufficient size to return the rack to its control of the door.

- the car.

. engagement with the normal position as soon as released from the It will be noticed that the arm f of the lever F is in the path of the extension of the arm 0 depending from the door. A roller maybe provided on the arm f if found necessary,

When the door is closed the arm 0 of the door will hold the rack out of line with the pinion on the car, and the door will be held closed by the latch (Z and as soon as the latch is actuated and the door for instance as shown in Fig. 3, the weight f will remove the rack to the position shown in said figure and in line with a pinion on In place of the weight, 1 may use springs F mounted on the rods e, the arm 0 on the door contacting with a projection e on the rack E, Fig. 5.

Mounted on the under side of the car G is a bearing H, for 'a shaft H on which is mounted a pinion I and a sprocket wheel K. The teeth of the pinion are arranged to mesh with the teeth of the rack E, and when the rack is in the position shown in Figs. 2 and 3, the teeth of the rack are in teetln of the pinion, consequently any movement up or down of the car G will cause the pinion I to turn, and as the sprocket wheel is connected to the pinion it must turn with it. A chain l: passes around the sprocket wheel K, and around a sprocket wheel L on a shaft N, on which a-sprocket wheel N.

M is the hand wheel within the car, mounted on a shaft M, which passes through the side of the car, and on the shaft is a sprocket wheel M. A chain m passes around. the sprocket wheel M and around the sprocket wheel Non the shaft N. The shaft N is connected to the valve operating n'ieehanism of the elevator in the ordinar manner, so that any movement of the shaf t N will so operate the mechanism as to stop the ear or'move it' either up or down, so that when the mechanism is in gear with the rack E if the elevator should gradually drop from the position in line with the floor of the landing, it will immediately operate the controlling mechanism, so as to bring the car back to a point on a line with the landing.

Onthe shaft N is an eccentric S, having a strap 8 connected by a rod-s to a lever T loose on the shaft H in the present instance, and on this lever is a roller which, when the car is in the position illustrated partially opened,

on the wall of the elevator, Well elevator well, as illusti that when the the operator to stop the is at the landing, the on its shaftfthat it T, bringing its latch, pressin door, after w hy the operator and on the car.

The-teeth of the rack, as well as the teeth on the pinion, are preferably beveled at one or.jboth ends so as to insure the meshing and in place of the lever T a lever T pivoted at 25 maybe of the rack with the pinion,

used carrying a roller t as illustrated in rigidly imposition against any the car or its pinion. the car when the landing.

I *claim:

1. The combinatlon in interlocking mechanism for elevators of a landing, a door at the landing, a car, controlling mechanism the car geared to the for the car, a pinion .on

controlling mechanism, means on the of the elevator Well including a latch and a rack movable parallel to the axis of the ion, said rack into gear with the pinion when the landing Y door is openand moved to one side of'the. gear when the landing door is closed. 2. The combination of a landing, a landa latch pivoted to the wall of the elevator well, guides onthe wall of the. eleing door,

ted. in Fig. 2 ,so hand wheel M is turned by car when the car. eccentric is so adjusted will project'the lever roller in contact withtjlje the latch and releasing the ich the door can be opened this will immediately release the rack E and its lever or spring will move it into mesh with the pinion movement of .Any movement of car is at the landing must be transmitted to the valve mechanism, so as I to bring the car ator about the level of the being automatically moved ceases.

'r'r'z'ifltor'v well,1a;. ra k adap the car, controlling mechanism, on the car connected. with the mechanism of the'car, means for holding the rack in the path of the pinion on the car, means on the door for holding the rack out of the 'path of the pinion on the car when the door is closed, and means on the door for engaging'the latch.

ing door, a frame on the wall of the elevator well at the landing,

the rack out of position when the door is 6. closed, and means on the door for engaging hen the rack is in mesh with the plnion, the latch, a car, and operating means for it cannot be thrown out of gear until it is actuating the controlling means, a shaft moved bodily to one side, as the rack is held geared to said operating mechanism, an eccentricen the shaft and a also on the shaft, a second, shaft, a pinio" wall landing.

In testimony whereof, I have signed my name to this specification, in, the presence of two subscribing witnesses.

,JUHN s. Ucntn.

pin-

Witnesses: HENRY Howsorr',

WImA. BARR.

guides, 'a car, latch operating mechanismfon and a pin on- COBIGTOHIHQ" 3. The combination of a landing, a landsprocket wheel c on the second shaft adapted to mesh With thy rack on the wall otlthe .elevator well, a

ted to slide on slai d 5 a latch pivoted to the frame, transverse guides on the frame, a

,lease the door when the mechanism is op} erated to bring the car to a standstill at the 

